I've been bothered by the bright silver finish on the Addi turbo needles...it's blinding to my old eyes... searched and found a product that turns them charcoal grey! ...it's a liquid called "Blacken it" used to antique model trains and tracks. Got it from Micromark.. www.micromark.com. I just cleaned the turbo needles to get rid of finger grease...and dipped them in the bottle...then rinsed. ...they're now a warm charcoal grey colour. it doesn't rub off or stain... Bill